But Mourinho is desperate to go on and win the Europa League to guarantee United a return to the Champions League next season.

Now Bailly has called on the United fans to be the twelfth man when Rostov come to town.

He said: "At Old Trafford, the fans are like the '12th player. They always give everything until they are hoarse to get behind us and give us a lift.

"It's great that the tie will be decided at home and we can do our utmost to get the victory needed and send the fans home happy.

Has Manchester United's home kit for next season been leaked?

AN image showing what could be Manchester United's home kit for next season has been leaked.

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Eric Bailly and United will be without the suspended Zlatan Ibrahimovic against Rostov

"It's really important that we make the quarter-finals in this very difficult competition.

"All the players are aware of how much it means to make it through and so, when the day of the match comes around, we'll be ready and prepared to ensure we start well.

"We always aim high in everything we do here. I managed to get to the semi-finals last year (with Villarreal) but that wasn't enough.

"We didn’t win the cup or even get to the final itself so, for me now, it's all about taking things a stage at a time.

"As I've said before, this competition brings plenty of surprises in a season so, first of all, we have to focus on getting through against Rostov and then we can think a little further ahead after that."